Portable beverage dispenser

Claim 1

IN PORTABLE DISPENSING APPARATUS FOR DISPENSING A CARBONATED BEVERAGE, THE COMBINATION INCLUDING: A CONTAINER HAVING THEREIN A BEVERAGE CHAMBER ADAPTED TO CONTAIN A CARBONATED BEVERAGE AT A DISPENSING TEMPERATURE AND PRESSURE AND TO HAVE SUCCESSIVE PORTIONS OF THE BEVERAGE DISPENSED THEREFROM; A GAS CHAMBER INSIDE THE CONTAINER ADAPTED TO CONTAIN A SUPPLY OF CARBON DIOXIDE GAS UNDER A PRESSURE GREATER THAN THE PRESSURE EXERTED BY THE BEVERAGE AT THE DISPENSING TEMPERATURE; CONDUIT MEANS INSIDE THE CONTAINER COMMUNICATING AT ONE OF ITS ENDS WITH THE GAS CHAMBER AND AT ITS OTHER END WITH THE BEVERAGE CHAMBER AND COMPRISING A GAS RELEASE VALVE WHEREBY CARBON DIOXIDE CAN BE RELEASED FROM THE GAS CHAMBER INTO THE BEVERAGE CHAMBER; AND VALVE-ACTUATING MEANS WITHIN THE CONTAINER RESPONSIVE TO CHANGE IN PRESSURE IN THE BEVERAGE CHAMBER AND ADAPTED, WHEN THE PRESSURE IN THE BEVERAGE CHAMBER FALLS BELOW THE DISPENSING PRESSURE, TO OPEN THE GAS RELEASE VALVE AND PERMIT CARBON DIOXIDE TO FLOW FROM THE GAS CHAMBER INTO THE BEVERAGE CHAMBER TO RESTORE THE PRESSURE IN THE BEVERAGE CHAMBER TO THE DISPENSING PRESSURE WHEREBY ES-